The temperatures in Mar del Plata in September are quite cold with temperatures between 8°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Mar del Plata during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Mar del Plata in September 2025.
If you’re planning to visit Mar del Plata in the near future, we highly recommend that you review the 14 day weather forecast for Mar del Plata before you arrive.